The package is not currently digitally signed, but as long as you're downloading from the URL in step 3, it should be safe.

程序包目前未经过数字签名，但只要您是按照第三步的 URL 下载的，就是安全的。

youdao

Older equipment powered by fossil fuels should be inspected every year to make sure it continues to be safe.

VOA: special.2010.02.02

But the reason companies including Regeneron, its partner Sanofi, Amgen, and Pfizer are so excited about PCSK9 is because it should be a safe target.

FORBES: Analyst Is Skeptical Of Rival Company's Warnings About Regeneron

From that record it seems we should be safe for a while.

FORBES: Has the Swine Flu Disappeared?

Several environmental groups are bucking the president, maintaining that unless fracking is certifiably safe, it should be indefinitely postponed.

FORBES: Can Shale Gas Build Tomorrow's Energy Bridge?